lkml.org 
[lkml]   [2016]   [Feb]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] arm64: Add workaround for Cavium erratum 27456
On Tue, Feb 09, 2016 at 11:29:16AM -0800, David Daney wrote:
> From: Andrew Pinski <apinski@cavium.com>
>
> On ThunderX T88 pass 1.x through 2.1 parts, broadcast TLBI
> instructions may cause the icache to become invalid if it contains
> data for a non-current ASID.
>
> This patch implements the workaround (which flushes the local icache
> when switching the mm) by using code patching.

So, to be clear, is this "just" a performance problem as opposed to a
correctness issue? If so, do you have any numbers with and without this
change?

Will

\
 
 \ /
  Last update: 2016-02-10 10:41    [W:0.076 / U:3.152 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site